On Tuesday, February 27, 2018 at 7:16:13 AM UTC-8, Ross wrote:
Not sure how many Discus 2 and Ventus 2 fuses I made, but none of them have a glass turtle deck.
Radio antenna located in the fin which is glass, except the Nimbus 4 where it is located in the rudder.
This however doesn't help your issue

Has anyone tried putting a transponder antenna like the T2glued to the inside the turtle deck? does the antenna require a downward view? 250 watts of RF too close to your head? This would make install on an ASW27 MUCH simpler than a fin or stinger on the outside behind the gear, not to mention more aerodynamic.